When you interact with the character selection before the animation stops, it stops working
How to replicate: At the Planewalkers screen, click on to choose another planewalker, clicking characters slider before it finishes the moving animation causes it to stop responding. Only happens when the slider moves, it means you have a character placed at the right side and the animation slides from Chandra to the one selected.
Screenshot won't help, so I'm not adding any.
Keep up the great work.